Sangsasri, V., S. Sirisalipoch, S. Gonlachanvit, and T. Chaiwatanarat. “Accuracy of esophageal scintigraphy for evaluation of esophageal motility disorders”. Chulalongkorn Medical Journal, vol. 58, no. 2, Sept. 2023, https://he05.tci-thaijo.org/index.php/CMJ/article/view/640.